Growing kale in containers is a cinch. You can harvest it many times, picking up the young tender leaves again and again or cutting the whole plant at once. The kale is a cool weather crop but it can still tolerate some summer heat. However, this biennial starts to taste somewhat bitter and strong during hotter months. Kale should be planted in full sun in colder regions and in partial sun in warmer regions.
Chard tolerates heat better than kale and it is more suitable for you if you live in a warm climate. However, it is still a cold weather crop and if you’re thinking to grow this in USDA Zone 9 and above or in any other subtropical or tropical part of the world– wait for the end of summer. Both kale and chard can be grown in small sized pots. Each plant requires at least 6 inches of space.
15. Mustard Greens
Mustard greens are not as cold hardy as the above two (Kale and Chard), they love warmth. However, in any climate growing mustard greens is easy and they grow without much attention. You can pick big leaves to prepare leafy green recipes and curries, whereas young tender leaves are more suitable for salads and sandwiches. There are many mustard varieties available that you can choose according to your needs.
Garlic bulbs are expensive but they are one of the healthiest food too. The best part is you can also grow them at home in containers. Garlic greens can be eaten too, you can use them in salads, in sandwiches, and in many other preparations. For growing garlic in containers, choose a pot that is at least 6-8 inches deep and as wide as possible, you’ll need to leave 5-6 inches of space between each clove you plant.
Rhubarb is grown for its red, pink or greenish pink edible stalks. Why we’ve added rhubarb in this list is the reason that growing rhubarb is easy (even in containers), it grows for years and you can harvest the stalks multiple times. Also, this perennial is very cold hardy and can be grown under the USDA Zones 3-8. For growing rhubarb you’ll need a really deep pot and well-draining soil.
18. Bitter Melon
This exotic and healthy edible is probably one of the best vegetables to grow in pots. Bitter melon is a tropical climber but it can be planted as an annual in summer in temperates. Growing it is similar to squashes, cucumbers, and melons. You’ll need a 12 inches deep pot and a sturdy trellis. To read more about growing bitter melons read this article.
Okra is a warm season crop. It is easy to grow and doesn’t require masterful gardening skills. Providing it warmth, good exposure to the sun and feeding with plenty of fertilizer sets the plant to fruit heavily. Dwarf okra varieties are more suitable for containers. You can learn more about growing okra here.
20. Collard Greens
Collard greens can be a good alternative of spinach or other green leafy crops. You can grow this biennial as an annual in containers easily. You can harvest kale quickly after 75 days from transplanting. Harvesting young and tender leaves; cut them back and they will come again. You can harvest regularly until the first hard freeze occurs in your region. If you live in a warm frost free climate, grow collards in winter.